Jacquard mechanism for looms



- Aug. 17 1929. 1,596,298

J. B. OLCH JACQUARD MECHANISM FOR LOOMS Filed August 18. 1325 I vvENv-ola Jicos .5. 04.014

Patented Aug. 17, 1926.

ITE-n srarss PATENT zorrics.

- JACOB B. OLCI-LOF PROVIDENCE, RHODE ISLAND, ASSIGNOB TO GROMPTON 3; KNOWLES 'LooM WORKS, or wonons'rnn, MASSACHUSETTS, A CORPORATION 0F ;MASSAGHU- JACQUARD MEGHANISIVL FOR LOOMS.

Application filed August 18, 1925. Serial no.51,o61.

This invention relates to improvements in jacquard mechanism for loomsand an object of the invention is to provide means for holding, certain risers position while permitting the j remaining hooks to be operated on in theusual manner.

Not infrequently it happensthat a loom is required to weave a lighter fabric than that for which it was designed and in order to prevent undue wear. and reduce the cutting of the cards .it' is desirable to make some provisions for holding out of action those hooks which are not to .be used. For instance, the jacquard mechanism may be de signed for use with six frames but it may be desired to use the same with but five rames in which case the hooks corresponding to the sixth frame would be idle and should be held in inactive position.

It is a further object of my invention to render selected hooks inactive by holding the corresponding needles out of action permanently, this being accomplished by forming each. needle with an eye positioned to receive a pin which is so located as to pass through the eyes and hold the selected needles in inoperative position.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein I have shown a convenient embodiment of my invention Fig. 1 is a vertical longitudinal section through the upper part of a jacquard mechanism showing my invention applied thereto.

Fig. 2 is an enlarged sectional elevation of a portion of Fig, 1,

Fig. 3 is a horizontal section on line 3-3 of Fig. 2, and

Fig. 4 is a top plan view of one of the needles forming partv of my invention.

Referring to the drawings it will be seen that I have provided a jacquard frame 10 having a griff 11 provided with knives 12 which reciprocate vertically with the griff to engage the hooks 13. One end of the jacquard is provided with a needle board 14 through which the ends of the needles 15 pass. A cylinder 16 positions the cards 17 which cooperate with the needles to more some of them and to leave others unmoved or'hooks in inoperative as the cylinder advances toward needle board 14;. The opposite end of the jacquard is provided witha spring box 18 having vertical rods 19 which extend between the parallel sidesQO of the corresponding needlesf Each needle is provided with a shoulder 21 and has a saring 22 located between the shoulder and the associated rod 19. Spacing wires 23 position the needles vertically. The matter thus far described is of common construction and forms no part of my invention.

My improvements relate more particularly to the devices for holding selected needles in inactive position. v In carrying out my invention I provide a pair of blocks 30 secured to the spring box and perforated as at 31 to receive a plurality of locking pins 32. Theneedles are each provided with an eye 33 adapted to receive the locking pin 32. The eyes 33 arepositioned on the needles so that when the latter are pushedrby a blank space on the cards said eye-s will not engage the locking pins 32 but will be free to move as far as required. When any needles are to be held out of position, however, they will be moved to the position occupied by the upper needles as shown in Fig. 1 so that the pins 32 may be passed therethrough. WVhen in this position the needles are held out of position with respect to the cards and their cor responding hooks are moved to the position occupied by the two hooks at the right of Fig. 1 to clear the knives as the latter! rise and fall. As shown herein my invention can be used to convert a six frame jacquard into one controlling but five frames, the needles and hooks corresponding to the unused frame being displaced and held out of position.

F rom the foregoing it will be seen that I have provided a very simple device for holding in inoperative position those needles which are not to be employed in weaving fabrics requiring less than the full capacity of the jacquard and that the devices are so arranged as not to interfere with the operation of those needles which are in use.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention, and

I do not wish to be limited to the details herein disclosed but what I claim is 1. In a jacquard mechanism for looms having risers, reciprocable knives to cooperate with the same, needles to position the risers, and springs cooperating to hold the needles in normal position, said needles being formed with eyes, the combination of a pin held in fixed position on the jacquard to pass through the eyes of certain of the needles and hold said needles out of normal position.

2. In a jacquard mechanism for looms having reeiprocable knives, risers to be engaged by the same, needles having eyes formed therewith to position the risers, and cards to control the needles, the combination of a locking pin the normal position of which is spaced from the eyes in the needles,

said pin being held in stationary position and passing through the eyes of selected needles to hold the latter out of the range of action of the cards.

3. A needle for loom jacquard mechanism operating with cards, said needle'being formed of a wire one end of which is sub stantially straight to cooperate with a jacquard card and the other end of which is bent back upon itself, a portion of the bent back end being farther from the adjacent part of the needle than other portions of the bent back end, and the intermediate part of the needle being'bent on itself to form an eye by which the needlev may be held in fixed position. v

In testimony whereof i have hereunto atfixed my signature. JACOB B. 01135 

